The scientific models can do pretty well predicting how polar bears or bald eagles will do under certain conditions. But the Indiana folks say, "One thing these models can't account for are the unpredictable behavior of human beings whose lives influence and are influenced by conservation efforts." So they recommend a long-term study of how to make conservation policies work with the ever-present human factors.
Even the American government's U.S.Geological Survey is now predicting a sorry future for the polar bear. Less ice makes polar bear hunting in the Arctic highly problematic. So as the Geological Survey looks at what can or should be done for the polar bears in the face of disappearing ice, we hope they'll be looking at the various crucial human issues as well. Guess we can't make new "ice floes" out of all that plastic killing albatrosses in the mid-Pacific?
The polar bear picture is courtesy of the U.S. Geological Survey.